As the scorching summer heat sets in, air conditioning becomes a go-to solution for many households. However, overusing ACs can lead to skyrocketing electricity bills and negatively impact your body’s natural ability to adapt to hot weather. A recent study from Australia reveals a simple yet effective tip to save energy and protect your health: use a fan before turning on the AC and set the temperature reasonably.
1. University of Sydney Study Unveils Efficient and Cost-Effective Cooling: Add a Small Fan
Scientists from the University of Sydney’s Thermal Health and Comfort Research Group conducted a series of experiments in tropical conditions to find the optimal cooling method. Surprisingly, they found that a simple electric fan can help extend the use of air conditioning, reduce energy consumption, and still keep you comfortable.
The researchers recommend only turning on the air conditioner when the room temperature exceeds 27°C. For temperatures below this threshold, a fan creates a gentle breeze that aids in more efficient heat dissipation from the body.

Why do fans make you feel cooler?
Even though fans don’t lower air temperature, they provide a cooling sensation due to two scientific mechanisms:
- They increase the rate of heat exchange between the skin and the surrounding air, helping the body cool down faster.
- Fans accelerate sweat evaporation, reducing the feeling of stuffiness and discomfort.
With a gentle breeze from the fan, you can feel comfortable even when the AC is set at 27-28°C instead of the usual 23-24°C. This simple adjustment significantly reduces electricity costs.
2. Adjusting AC Temperature Saves up to 30% Energy
Another notable finding from the study is that by increasing the AC temperature from 24°C to 26.5°C and using a fan, energy consumption can be reduced by almost 30% without compromising on comfort.
Electric fans consume only about 3% of the energy used by air conditioners. Using a fan initially to cool the room and its occupants means that the AC doesn’t have to work as hard or as long to maintain a comfortable temperature.

Overusing Air Conditioning Can Harm Your Health
Maintaining low temperatures for extended periods can reduce your body’s natural ability to regulate its temperature. This may lead to negative reactions such as dizziness when stepping outside into the heat, fatigue in the elderly, children, and those with cardiovascular issues, and reduced adaptability to hot and humid environments.
Therefore, using air conditioning wisely is not only beneficial for your wallet but also crucial for the long-term health of your family.
- Use a fan before turning on the AC to pre-cool your body.
- Only turn on the AC when the temperature exceeds 27°C to avoid excessive energy consumption.
- Combine ceiling or desk fans with ACs for better cold air distribution.
- Set your AC to 27-28°C for a balance between comfort and savings.
- Turn off the AC when the room is cool enough and use a fan to maintain the temperature, further reducing electricity usage.
Conclusion: With rising electricity prices and more extreme weather, it’s essential to adjust how we use cooling appliances. Using fans strategically and setting reasonable AC temperatures can save you millions of Dong each year, protect your health, and benefit the environment. Start today by turning on the fan before the AC and feel the difference!
Turn On This Button on the AC Remote: Unlocking the Comfort Zone
There’s a little-known button that brings big benefits. By simply pressing it, you unlock a treasure trove of advantages: energy savings, improved health, and extended appliance lifespan. This magic button is a game-changer, and those who know how to use it right hold the key to unlocking its full potential.